From bd95adf4bccda402b13cf43915e6ffef6e7d472c Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Mon, 1 Apr 2024 22:34:10 -0700
Subject: [PATCH] Optimize RunLengthFilter

---
 src/UglyToad.PdfPig/Filters/RunLengthFilter.cs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/UglyToad.PdfPig/Filters/RunLengthFilter.cs b/src/UglyToad.PdfPig/Filters/RunLengthFilter.cs
index d2cede37..40b49620 100644
--- a/src/UglyToad.PdfPig/Filters/RunLengthFilter.cs
+++ b/src/UglyToad.PdfPig/Filters/RunLengthFilter.cs
@@ -55,10 +55,8 @@
 
                     var byteToCopy = input[i + 1];
 
-                    for (int j = 0; j < numberOfTimesToCopy; j++)
-                    {
-                        output.Write(byteToCopy);
-                    }
+                    output.GetSpan(numberOfTimesToCopy).Slice(0, numberOfTimesToCopy).Fill(byteToCopy);
+                    output.Advance(numberOfTimesToCopy);
 
                     // Move to the single byte after the byte to copy.
                     i += 2;